CNDB-8491: add existing sstables into SAI even if intiial build is skipped

[jasonstack]

No description provided.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[cassci-bot]

❌ Build ds-cassandra-pr-gate/PR-1420 rejected by Butler

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7 new test failure(s) in 3 builds
See build details here

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Found 7 new test failures

Test	Explanation	Branch history	Upstream history
o.a.c.i.s.c.VectorLocalTest.rangeRestrictedTest...	regression	🔴🔵🔵	🔵🔵🔵🔵🔵🔵🔵
...aset=date,wide=false,scenario=POST_BUILD_QUERY]	regression	🔴🔵🔵	🔵🔵🔵🔵🔵🔵🔵
...et=list,wide=true,scenario=SSTABLE_QUERY]	regression	🔴🔵🔵	🔵🔵🔵🔵🔵🔵🔵
...p<date,date>,wide=true,scenario=MEMTABLE_QUERY]	flaky	🔵🔴🔵	🔵🔵🔵🔵🔵🔵🔵
...map<date,date>,wide=false,scenario=MIXED_QUERY]	flaky	🔵🔴🔵	🔵🔵🔵🔵🔵🔵🔵
...t,wide=true,scenario=POST_BUILD_QUERY]	regression	🔴🔵🔵	🔵🔵🔵🔵🔵🔵🔵
o.a.c.u.b.BinLogTest.testTruncationReleasesLogS...	flaky	🔴🔵🔴	🔵🔵🔵🔵🔵🔵🔵

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Found 11 known test failures