perf- add correct indexes for api/v2/purl?q=

[JimFuller-RedHat]

This PR ensures that any searches of api/v2/purl?q= takes advantage of newly defined GIN indexes which is confirmed by running explain on test query

explain analyze SELECT 
    qp.id, 
    qp.versioned_purl_id, 
    qp.qualifiers, 
    qp.purl 
FROM 
    qualified_purl qp
WHERE 
    (qp.qualifiers ->> 'arch' ILIKE 'test1') OR 
    (qp.qualifiers ->> 'distro' ILIKE 'test2') OR
    (qp.qualifiers ->> 'repository_url' ILIKE 'test3') OR 
    (qp.purl ->> 'ty' ILIKE 'test4') OR 
    (qp.purl ->> 'namespace' ILIKE 'test5') OR 
    (qp.purl ->> 'name' ILIKE 'test6') OR 
    (qp.purl ->> 'version' ILIKE 'test7');

which results in query plan using indexes.

 Bitmap Heap Scan on qualified_purl qp  (cost=123.77..248.84 rows=110 width=200) (actual time=49.323..49.326 rows=0 lo
ops=1)
   Recheck Cond: (((qualifiers ->> 'arch'::text) ~~* 'test1'::text) OR ((qualifiers ->> 'distro'::text) ~~* 'test2'::t
ext) OR ((qualifiers ->> 'repository_url'::text) ~~* 'test3'::text) OR ((purl ->> 'ty'::text) ~~* 'test4'::text) OR ((purl ->> 'namespace'::text) ~~* 'test5'::text) OR ((purl ->> 'name'::text) ~~* 'test6'::text) OR ((purl ->> 'version'::text) ~~* 'test7'::text))
   ->  BitmapOr  (cost=123.77..123.77 rows=110 width=0) (actual time=49.318..49.321 rows=0 loops=1)
         ->  Bitmap Index Scan on qualifiedpurlqualifierarchjsonginidx  (cost=0.00..53.80 rows=1 width=0) (actual time=0.080..0.080 rows=0 loops=1)
               Index Cond: ((qualifiers ->> 'arch'::text) ~~* 'test1'::text)
         ->  Bitmap Index Scan on qualifiedpurlqualifierdistrojsonginidx  (cost=0.00..28.83 rows=1 width=0) (actual time=0.065..0.065 rows=0 loops=1)
               Index Cond: ((qualifiers ->> 'distro'::text) ~~* 'test2'::text)
         ->  Bitmap Index Scan on qualifiedpurlqualifierrepositoryurljsonginidx  (cost=0.00..34.60 rows=1 width=0) (actual time=0.131..0.131 rows=0 loops=1)
               Index Cond: ((qualifiers ->> 'repository_url'::text) ~~* 'test3'::text)
         ->  Bitmap Index Scan on qualifiedpurltypejsongistidx  (cost=0.00..1.39 rows=1 width=0) (actual time=0.006..0.006 rows=0 loops=1)
               Index Cond: ((purl ->> 'ty'::text) ~~* 'test4'::text)
         ->  Bitmap Index Scan on qualifiedpurlnamespacejsongistidx  (cost=0.00..1.53 rows=19 width=0) (actual time=18.622..18.623 rows=0 loops=1)
               Index Cond: ((purl ->> 'namespace'::text) ~~* 'test5'::text)
         ->  Bitmap Index Scan on qualifiedpurlnamejsongistidx  (cost=0.00..1.74 rows=47 width=0) (actual time=11.122..11.122 rows=0 loops=1)
               Index Cond: ((purl ->> 'name'::text) ~~* 'test6'::text)
         ->  Bitmap Index Scan on qualifiedpurlversionjsongistidx  (cost=0.00..1.69 rows=41 width=0) (actual time=19.290..19.290 rows=0 loops=1)
               Index Cond: ((purl ->> 'version'::text) ~~* 'test7'::text)

Note- will probably drop already existing GIST indexes once we determine not needed in graph analysis (part of other ongoing multi sbom work).

[ctron]

LGTM: We just be need to careful to not have GIN indices and the tonic crate come too close.