feat(table): extract communityAnyIndex and add fast match for ext-comms

[Ivan-Pokhabov]

• Rename communityLocalBitmap → localAdminBitmap and add receiver methods (isSet/set/or/fillAll) replacing four standalone functions
• Extract communityAnyIndex (perAS, asnIndependent, hasRegexp) with matchesAny() method, replacing three separate fields on CommunitySet
• buildCommunityMatcherBitmaps now returns communityAnyIndex directly
• CommunityCondition.Evaluate() delegates fast path to anyIdx.matchesAny()

[Ivan-Pokhabov]

Perf and fuzzing

➜  gobgp git:(feat/community-and-ext-comm-matcher-infra)✗ go test ./internal/pkg/table/... -run "FuzzExtCommunity" -fuzz=FuzzExtCommunityCondition -v    14:53:38
=== RUN   FuzzExtCommunityCondition
fuzz: elapsed: 0s, gathering baseline coverage: 0/618 completed
fuzz: elapsed: 1s, gathering baseline coverage: 618/618 completed, now fuzzing with 10 workers
fuzz: elapsed: 3s, execs: 59490 (19825/sec), new interesting: 5 (total: 623)
fuzz: elapsed: 6s, execs: 150131 (30213/sec), new interesting: 12 (total: 630)
fuzz: elapsed: 9s, execs: 241101 (30326/sec), new interesting: 26 (total: 644)
fuzz: elapsed: 12s, execs: 298600 (19161/sec), new interesting: 33 (total: 651)
fuzz: elapsed: 15s, execs: 355113 (18843/sec), new interesting: 40 (total: 658)
fuzz: elapsed: 18s, execs: 400748 (15213/sec), new interesting: 42 (total: 660)
fuzz: elapsed: 21s, execs: 443416 (14218/sec), new interesting: 46 (total: 664)
fuzz: elapsed: 24s, execs: 487368 (14651/sec), new interesting: 55 (total: 673)
fuzz: elapsed: 27s, execs: 535953 (16193/sec), new interesting: 58 (total: 676)
fuzz: elapsed: 30s, execs: 583499 (15833/sec), new interesting: 59 (total: 677)
fuzz: elapsed: 33s, execs: 626857 (14474/sec), new interesting: 63 (total: 681)
fuzz: elapsed: 36s, execs: 669707 (14283/sec), new interesting: 67 (total: 685)
fuzz: elapsed: 39s, execs: 715419 (15233/sec), new interesting: 70 (total: 688)
fuzz: elapsed: 42s, execs: 744468 (9686/sec), new interesting: 77 (total: 695)
fuzz: elapsed: 45s, execs: 760893 (5472/sec), new interesting: 78 (total: 696)
fuzz: elapsed: 48s, execs: 769052 (2720/sec), new interesting: 78 (total: 696)
fuzz: elapsed: 51s, execs: 777010 (2651/sec), new interesting: 78 (total: 696)
^Cfuzz: elapsed: 52s, execs: 779683 (2920/sec), new interesting: 79 (total: 697)
--- PASS: FuzzExtCommunityCondition (51.96s)
=== NAME
PASS
ok      github.com/osrg/gobgp/v4/internal/pkg/table     52.367s

➜  gobgp git:(feat/community-and-ext-comm-matcher-infra)✗ GOBGP_COMMUNITY_BENCH_COMPARE=1 go test ./internal/pkg/table/ -v -run 'TestExtCommunityConditionCompareSummary' -count=1 2>&1
=== RUN   TestExtCommunityConditionCompareSummary

[extended community]
bench           new ns/op  legacy ns/op  legacy/new  name
-----           ---------  -----------   --------    ----
rt9_exact_last  14         292           20.86x      RT / 9 exact patterns / last matches
rt9_exact_none  15         81            5.40x       RT / 9 exact patterns / no match
rt15_mix_exact  19         407           21.42x      RT / 15 patterns / wildcard prefix / exact RT match
rt15_mix_wild   20         139           6.95x       RT / 15 patterns / wildcard prefix / wildcard RT match
rt15_multi_3rt  19         919           48.37x      RT / 15 patterns / 3 RTs / early match
rt_local_digit  13         166           12.77x      RT / ^\d+:local / bitmap-style / match
rt_local_alt    13         174           13.38x      RT / ^\d+:(a|b) / bitmap-style / match
rt_local_miss   14         148           10.57x      RT / ^\d+:local / no match
--- PASS: TestExtCommunityConditionCompareSummary (22.54s)
PASS
ok      github.com/osrg/gobgp/v4/internal/pkg/table     24.057s

[fujita]

Pushed, thanks.