Add spdx relationship encoding for dependencies

[wagoodman]

This is a follow up to #1063 to prevent warning outputs for unsupported relationship types:

[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                    15.3ms ± 6%    11.7ms ± 1%  -23.71%  (p=0.008 n=5+5)
ImagePackageCatalogers/ruby-gemspec-cataloger-2              1.79ms ±13%    1.35ms ±10%  -24.25%  (p=0.008 n=5+5)
ImagePackageCatalogers/python-package-cataloger-2            4.27ms ± 1%    3.31ms ± 0%  -22.54%  (p=0.008 n=5+5)
ImagePackageCatalogers/php-composer-installed-cataloger-2    1.39ms ± 6%    1.08ms ± 0%  -21.85%  (p=0.008 n=5+5)
ImagePackageCatalogers/javascript-package-cataloger-2         978µs ± 3%     752µs ± 0%  -23.04%  (p=0.008 n=5+5)
ImagePackageCatalogers/node-binary-cataloger-2               8.02µs ± 3%    6.81µs ± 1%  -15.11%  (p=0.008 n=5+5)
ImagePackageCatalogers/dpkgdb-cataloger-2                    1.11ms ± 5%    0.87ms ± 2%  -21.33%  (p=0.008 n=5+5)
ImagePackageCatalogers/rpm-db-cataloger-2                    1.66ms ± 5%    1.28ms ± 1%  -22.89%  (p=0.008 n=5+5)
ImagePackageCatalogers/java-cataloger-2                      18.5ms ± 3%    14.5ms ± 0%  -21.95%  (p=0.008 n=5+5)
ImagePackageCatalogers/apkdb-cataloger-2                     1.73ms ± 4%    1.33ms ± 1%  -22.63%  (p=0.008 n=5+5)
ImagePackageCatalogers/go-module-binary-cataloger-2          8.16µs ± 5%    6.87µs ± 1%  -15.81%  (p=0.008 n=5+5)
ImagePackageCatalogers/dotnet-deps-cataloger-2               1.80ms ± 2%    1.37ms ± 0%  -24.05%  (p=0.008 n=5+5)
ImagePackageCatalogers/portage-cataloger-2                    935µs ± 2%     717µs ± 0%  -23.32%  (p=0.008 n=5+5)
ImagePackageCatalogers/sbom-cataloger-2                      5.52ms ± 4%    4.45ms ± 1%  -19.35%  (p=0.008 n=5+5)

name                                                       old alloc/op   new alloc/op   delta
ImagePackageCatalogers/alpmdb-cataloger-2                    5.26MB ± 0%    5.26MB ± 0%     ~     (p=0.222 n=5+5)
ImagePackageCatalogers/ruby-gemspec-cataloger-2               205kB ± 0%     205kB ± 0%     ~     (p=0.056 n=5+5)
ImagePackageCatalogers/python-package-cataloger-2             961kB ± 0%     961kB ± 0%     ~     (p=0.690 n=5+5)
ImagePackageCatalogers/php-composer-installed-cataloger-2     217kB ± 0%     217kB ± 0%     ~     (p=0.222 n=5+5)
ImagePackageCatalogers/javascript-package-cataloger-2         159kB ± 0%     159kB ± 0%     ~     (p=0.548 n=5+5)
ImagePackageCatalogers/node-binary-cataloger-2               1.12kB ± 0%    1.12kB ± 0%     ~     (all equal)
ImagePackageCatalogers/dpkgdb-cataloger-2                     199kB ± 0%     199kB ± 0%     ~     (p=0.310 n=5+5)
ImagePackageCatalogers/rpm-db-cataloger-2                     302kB ± 0%     303kB ± 0%   +0.12%  (p=0.016 n=5+5)
ImagePackageCatalogers/java-cataloger-2                      3.49MB ± 0%    3.48MB ± 0%     ~     (p=0.421 n=5+5)
ImagePackageCatalogers/apkdb-cataloger-2                     1.26MB ± 0%    1.26MB ± 0%   -0.04%  (p=0.008 n=5+5)
ImagePackageCatalogers/go-module-binary-cataloger-2          1.12kB ± 0%    1.12kB ± 0%     ~     (all equal)
ImagePackageCatalogers/dotnet-deps-cataloger-2                375kB ± 0%     374kB ± 0%   -0.10%  (p=0.008 n=5+5)
ImagePackageCatalogers/portage-cataloger-2                    138kB ± 0%     139kB ± 0%   +0.17%  (p=0.008 n=5+5)
ImagePackageCatalogers/sbom-cataloger-2                       722kB ± 0%     722kB ± 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=0.881 n=5+5)
ImagePackageCatalogers/ruby-gemspec-cataloger-2               4.24k ± 0%     4.24k ± 0%     ~     (p=0.444 n=5+5)
ImagePackageCatalogers/python-package-cataloger-2             16.5k ± 0%     16.5k ± 0%     ~     (p=0.476 n=5+5)
ImagePackageCatalogers/php-composer-installed-cataloger-2     5.50k ± 0%     5.50k ± 0%     ~     (p=0.730 n=5+5)
ImagePackageCatalogers/javascript-package-cataloger-2         3.33k ± 0%     3.33k ± 0%     ~     (all equal)
ImagePackageCatalogers/node-binary-cataloger-2                 38.0 ± 0%      38.0 ± 0%     ~     (all equal)
ImagePackageCatalogers/dpkgdb-cataloger-2                     4.46k ± 0%     4.46k ± 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=0.794 n=5+5)
ImagePackageCatalogers/apkdb-cataloger-2                      5.45k ± 0%     5.45k ± 0%     ~     (p=0.484 n=5+5)
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%     ~     (all equal)
ImagePackageCatalogers/portage-cataloger-2                    3.58k ± 0%     3.58k ± 0%     ~     (p=0.079 n=5+5)
ImagePackageCatalogers/sbom-cataloger-2                       24.4k ± 0%     24.4k ± 0%     ~     (all equal)