Update cataloger tests to use pkgtest utils

[wagoodman]

This is a follow up to #1286 to use the new internal/pkgtest utils for testing. For consistency I'm also updating deep comparison references with cmp equivalents.

Note: this can't be merged until it is rebased with main

[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                    11.3ms ± 1%     8.3ms ± 0%  -26.08%  (p=0.008 n=5+5)
ImagePackageCatalogers/ruby-gemspec-cataloger-2              1.34ms ±11%    0.92ms ± 1%  -31.07%  (p=0.016 n=5+4)
ImagePackageCatalogers/python-package-cataloger-2            3.23ms ± 1%    2.38ms ± 1%  -26.38%  (p=0.008 n=5+5)
ImagePackageCatalogers/php-composer-installed-cataloger-2    1.05ms ± 1%    0.75ms ± 1%  -29.19%  (p=0.008 n=5+5)
ImagePackageCatalogers/javascript-package-cataloger-2         738µs ± 0%     514µs ± 1%  -30.34%  (p=0.008 n=5+5)
ImagePackageCatalogers/dpkgdb-cataloger-2                     875µs ± 1%     602µs ± 2%  -31.24%  (p=0.008 n=5+5)
ImagePackageCatalogers/rpm-db-cataloger-2                    1.26ms ± 1%    0.87ms ± 1%  -31.13%  (p=0.008 n=5+5)
ImagePackageCatalogers/java-cataloger-2                      14.3ms ± 1%    10.2ms ± 1%  -28.58%  (p=0.008 n=5+5)
ImagePackageCatalogers/apkdb-cataloger-2                     1.24ms ± 3%    0.91ms ± 2%  -27.12%  (p=0.008 n=5+5)
ImagePackageCatalogers/go-module-binary-cataloger-2          2.20µs ± 1%    1.62µs ± 1%  -26.10%  (p=0.008 n=5+5)
ImagePackageCatalogers/dotnet-deps-cataloger-2               1.37ms ± 0%    0.99ms ± 1%  -27.95%  (p=0.008 n=5+5)
ImagePackageCatalogers/portage-cataloger-2                    701µs ± 0%     476µs ± 0%  -32.17%  (p=0.008 n=5+5)

name                                                       old alloc/op   new alloc/op   delta
ImagePackageCatalogers/alpmdb-cataloger-2                    5.26MB ± 0%    5.26MB ± 0%   -0.03%  (p=0.016 n=5+5)
ImagePackageCatalogers/ruby-gemspec-cataloger-2               202kB ± 0%     202kB ± 0%     ~     (p=0.421 n=5+5)
ImagePackageCatalogers/python-package-cataloger-2             944kB ± 0%     944kB ± 0%     ~     (p=0.222 n=5+5)
ImagePackageCatalogers/php-composer-installed-cataloger-2     213kB ± 0%     213kB ± 0%     ~     (p=0.421 n=5+5)
ImagePackageCatalogers/javascript-package-cataloger-2         158kB ± 0%     158kB ± 0%     ~     (p=0.095 n=5+5)
ImagePackageCatalogers/dpkgdb-cataloger-2                     203kB ± 0%     203kB ± 0%     ~     (p=0.198 n=5+5)
ImagePackageCatalogers/rpm-db-cataloger-2                     301kB ± 0%     302kB ± 0%   +0.06%  (p=0.040 n=5+5)
ImagePackageCatalogers/java-cataloger-2                      3.44MB ± 0%    3.44MB ± 0%     ~     (p=0.690 n=5+5)
ImagePackageCatalogers/apkdb-cataloger-2                     1.25MB ± 0%    1.25MB ± 0%     ~     (p=0.222 n=5+5)
ImagePackageCatalogers/go-module-binary-cataloger-2            672B ± 0%      672B ± 0%     ~     (all equal)
ImagePackageCatalogers/dotnet-deps-cataloger-2                376kB ± 0%     376kB ± 0%   +0.05%  (p=0.032 n=5+5)
ImagePackageCatalogers/portage-cataloger-2                    136kB ± 0%     136kB ± 0%     ~     (p=0.690 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               4.24k ± 0%     4.24k ± 0%     ~     (all equal)
ImagePackageCatalogers/python-package-cataloger-2             16.5k ± 0%     16.5k ± 0%     ~     (p=0.198 n=5+5)
ImagePackageCatalogers/php-composer-installed-cataloger-2     5.50k ± 0%     5.50k ± 0%     ~     (p=0.095 n=5+4)
ImagePackageCatalogers/javascript-package-cataloger-2         3.31k ± 0%     3.31k ± 0%     ~     (all equal)
ImagePackageCatalogers/dpkgdb-cataloger-2                     4.57k ± 0%     4.57k ± 0%     ~     (all equal)
ImagePackageCatalogers/rpm-db-cataloger-2                     8.11k ± 0%     8.11k ± 0%     ~     (all equal)
ImagePackageCatalogers/java-cataloger-2                       57.5k ± 0%     57.5k ± 0%     ~     (p=0.802 n=5+5)
ImagePackageCatalogers/apkdb-cataloger-2                      5.39k ± 0%     5.39k ± 0%     ~     (all equal)
ImagePackageCatalogers/go-module-binary-cataloger-2            15.0 ± 0%      15.0 ± 0%     ~     (all equal)
ImagePackageCatalogers/dotnet-deps-cataloger-2                7.32k ± 0%     7.32k ± 0%     ~     (all equal)
ImagePackageCatalogers/portage-cataloger-2                    3.58k ± 0%     3.58k ± 0%     ~     (all equal)