Use SBOM data structure in ImportConfig

[wagoodman]

Migrates the import code to use the new sbom.SBOM data structure.

This is a follow up from a PR comment here: #606 (comment)

[github-actions]

Benchmark Test Results

Benchmark results from the latest changes vs base branch

name                                                   old time/op    new time/op    delta
ImagePackageCatalogers/ruby-gemspec-cataloger-2          1.27ms ± 0%    1.27ms ± 1%    ~     (p=0.905 n=4+5)
ImagePackageCatalogers/python-package-cataloger-2        2.90ms ± 1%    2.94ms ± 1%    ~     (p=0.056 n=5+5)
ImagePackageCatalogers/javascript-package-cataloger-2     755µs ± 2%     750µs ± 0%    ~     (p=0.421 n=5+5)
ImagePackageCatalogers/dpkgdb-cataloger-2                 824µs ± 0%     821µs ± 0%  -0.38%  (p=0.032 n=5+4)
ImagePackageCatalogers/rpmdb-cataloger-2                  779µs ± 0%     784µs ± 1%  +0.59%  (p=0.008 n=5+5)
ImagePackageCatalogers/java-cataloger-2                  10.9ms ± 1%    10.9ms ± 1%    ~     (p=0.548 n=5+5)
ImagePackageCatalogers/apkdb-cataloger-2                 1.15ms ± 0%    1.15ms ± 0%  -0.51%  (p=0.032 n=5+5)
ImagePackageCatalogers/go-module-binary-cataloger-2       617ns ± 1%     621ns ± 1%    ~     (p=0.095 n=5+5)

name                                                   old alloc/op   new alloc/op   delta
ImagePackageCatalogers/ruby-gemspec-cataloger-2           247kB ± 0%     247kB ± 0%    ~     (p=1.000 n=5+5)
ImagePackageCatalogers/python-package-cataloger-2        1.10MB ± 0%    1.10MB ± 0%    ~     (p=0.310 n=5+5)
ImagePackageCatalogers/javascript-package-cataloger-2     197kB ± 0%     197kB ± 0%    ~     (p=0.095 n=5+5)
ImagePackageCatalogers/dpkgdb-cataloger-2                 228kB ± 0%     228kB ± 0%  -0.06%  (p=0.008 n=5+5)
ImagePackageCatalogers/rpmdb-cataloger-2                  221kB ± 0%     221kB ± 0%    ~     (p=1.000 n=5+5)
ImagePackageCatalogers/java-cataloger-2                  3.24MB ± 0%    3.24MB ± 0%    ~     (p=0.095 n=5+5)
ImagePackageCatalogers/apkdb-cataloger-2                 1.29MB ± 0%    1.29MB ± 0%    ~     (p=0.548 n=5+5)
ImagePackageCatalogers/go-module-binary-cataloger-2        336B ± 0%      336B ± 0%    ~     (all equal)

name                                                   old allocs/op  new allocs/op  delta
ImagePackageCatalogers/ruby-gemspec-cataloger-2           6.79k ± 0%     6.79k ± 0%    ~     (all equal)
ImagePackageCatalogers/python-package-cataloger-2         26.3k ± 0%     26.3k ± 0%    ~     (p=0.690 n=5+5)
ImagePackageCatalogers/javascript-package-cataloger-2     5.17k ± 0%     5.17k ± 0%    ~     (all equal)
ImagePackageCatalogers/dpkgdb-cataloger-2                 6.65k ± 0%     6.65k ± 0%    ~     (all equal)
ImagePackageCatalogers/rpmdb-cataloger-2                  6.53k ± 0%     6.53k ± 0%    ~     (all equal)
ImagePackageCatalogers/java-cataloger-2                   58.9k ± 0%     58.9k ± 0%    ~     (p=0.405 n=5+5)
ImagePackageCatalogers/apkdb-cataloger-2                  7.71k ± 0%     7.71k ± 0%    ~     (p=0.683 n=5+5)
ImagePackageCatalogers/go-module-binary-cataloger-2        9.00 ± 0%      9.00 ± 0%    ~     (all equal)