Clean package names found in python catalogers

[wagoodman]

This PR fixes a couple of bugs:

• When there are formatting directives in setup.py package names (for dynamically crafted require lines, such as %s or {}) we should skip these lines
• When there are empty name or version fields for requirements.txt files (such as ==1.2.3) we should skip these lines

[github-actions]

Benchmark Test Results

Benchmark results from the latest changes vs base branch

name                                                       old time/op    new time/op    delta
ImagePackageCatalogers/alpmdb-cataloger-2                    13.3ms ± 1%    13.6ms ± 2%    ~     (p=0.114 n=4+4)
ImagePackageCatalogers/ruby-gemspec-cataloger-2              1.55ms ± 6%    1.54ms ± 2%    ~     (p=0.841 n=5+5)
ImagePackageCatalogers/python-package-cataloger-2            3.89ms ± 1%    3.86ms ± 0%    ~     (p=0.222 n=5+5)
ImagePackageCatalogers/php-composer-installed-cataloger-2    1.28ms ± 1%    1.28ms ± 1%    ~     (p=0.690 n=5+5)
ImagePackageCatalogers/javascript-package-cataloger-2         888µs ± 1%     890µs ± 1%    ~     (p=0.421 n=5+5)
ImagePackageCatalogers/dpkgdb-cataloger-2                    1.01ms ± 1%    1.03ms ± 1%  +2.04%  (p=0.008 n=5+5)
ImagePackageCatalogers/rpm-db-cataloger-2                    1.50ms ± 1%    1.54ms ± 1%  +2.23%  (p=0.008 n=5+5)
ImagePackageCatalogers/java-cataloger-2                      17.0ms ± 2%    17.4ms ± 2%    ~     (p=0.056 n=5+5)
ImagePackageCatalogers/apkdb-cataloger-2                     1.03ms ± 1%    1.04ms ± 2%    ~     (p=0.151 n=5+5)
ImagePackageCatalogers/go-module-binary-cataloger-2          7.44µs ± 2%    7.49µs ± 1%    ~     (p=0.421 n=5+5)
ImagePackageCatalogers/dotnet-deps-cataloger-2               1.60ms ± 1%    1.63ms ± 3%    ~     (p=0.421 n=5+5)
ImagePackageCatalogers/portage-cataloger-2                    848µs ± 1%     857µs ± 1%    ~     (p=0.095 n=5+5)
ImagePackageCatalogers/sbom-cataloger-2                      5.35ms ± 1%    5.43ms ± 1%  +1.47%  (p=0.016 n=5+5)
ImagePackageCatalogers/binary-cataloger-2                    4.74ms ± 1%    4.76ms ± 1%    ~     (p=0.151 n=5+5)

name                                                       old alloc/op   new alloc/op   delta
ImagePackageCatalogers/alpmdb-cataloger-2                    5.26MB ± 0%    5.26MB ± 0%    ~     (p=0.841 n=5+5)
ImagePackageCatalogers/ruby-gemspec-cataloger-2               205kB ± 0%     205kB ± 0%    ~     (p=0.548 n=5+5)
ImagePackageCatalogers/python-package-cataloger-2             962kB ± 0%     962kB ± 0%    ~     (p=0.222 n=5+5)
ImagePackageCatalogers/php-composer-installed-cataloger-2     217kB ± 0%     218kB ± 0%    ~     (p=0.421 n=5+5)
ImagePackageCatalogers/javascript-package-cataloger-2         159kB ± 0%     159kB ± 0%    ~     (p=0.056 n=5+5)
ImagePackageCatalogers/dpkgdb-cataloger-2                     199kB ± 0%     200kB ± 0%  +0.14%  (p=0.016 n=5+5)
ImagePackageCatalogers/rpm-db-cataloger-2                     303kB ± 0%     303kB ± 0%    ~     (p=0.063 n=5+5)
ImagePackageCatalogers/java-cataloger-2                      3.49MB ± 0%    3.49MB ± 0%    ~     (p=0.841 n=5+5)
ImagePackageCatalogers/apkdb-cataloger-2                      182kB ± 0%     182kB ± 0%    ~     (p=0.222 n=5+5)
ImagePackageCatalogers/go-module-binary-cataloger-2          1.12kB ± 0%    1.12kB ± 0%    ~     (all equal)
ImagePackageCatalogers/dotnet-deps-cataloger-2                375kB ± 0%     375kB ± 0%    ~     (p=0.841 n=5+5)
ImagePackageCatalogers/portage-cataloger-2                    139kB ± 0%     139kB ± 0%    ~     (p=1.000 n=5+5)
ImagePackageCatalogers/sbom-cataloger-2                       722kB ± 0%     722kB ± 0%  +0.01%  (p=0.008 n=5+5)
ImagePackageCatalogers/binary-cataloger-2                     656kB ± 0%     656kB ± 0%  +0.01%  (p=0.008 n=5+5)

name                                                       old allocs/op  new allocs/op  delta
ImagePackageCatalogers/alpmdb-cataloger-2                     85.7k ± 0%     85.7k ± 0%    ~     (p=1.000 n=5+5)
ImagePackageCatalogers/ruby-gemspec-cataloger-2               4.25k ± 0%     4.25k ± 0%    ~     (all equal)
ImagePackageCatalogers/python-package-cataloger-2             16.5k ± 0%     16.5k ± 0%    ~     (p=0.087 n=5+5)
ImagePackageCatalogers/php-composer-installed-cataloger-2     5.50k ± 0%     5.50k ± 0%    ~     (p=1.000 n=5+5)
ImagePackageCatalogers/javascript-package-cataloger-2         3.33k ± 0%     3.33k ± 0%    ~     (all equal)
ImagePackageCatalogers/dpkgdb-cataloger-2                     4.47k ± 0%     4.47k ± 0%    ~     (all equal)
ImagePackageCatalogers/rpm-db-cataloger-2                     8.12k ± 0%     8.12k ± 0%    ~     (all equal)
ImagePackageCatalogers/java-cataloger-2                       57.5k ± 0%     57.5k ± 0%    ~     (p=0.325 n=5+5)
ImagePackageCatalogers/apkdb-cataloger-2                      5.23k ± 0%     5.23k ± 0%    ~     (p=0.095 n=5+4)
ImagePackageCatalogers/go-module-binary-cataloger-2            38.0 ± 0%      38.0 ± 0%    ~     (all equal)
ImagePackageCatalogers/dotnet-deps-cataloger-2                7.12k ± 0%     7.12k ± 0%    ~     (p=1.000 n=5+5)
ImagePackageCatalogers/portage-cataloger-2                    3.58k ± 0%     3.58k ± 0%    ~     (all equal)
ImagePackageCatalogers/sbom-cataloger-2                       24.4k ± 0%     24.4k ± 0%    ~     (all equal)
ImagePackageCatalogers/binary-cataloger-2                     22.2k ± 0%     22.2k ± 0%    ~     (all equal)