FDB release 7.4: use RocksDB v8.11.5

[spraza]

Fb has tagged the rocksdb v8.11.5 release: facebook/rocksdb#14145 (comment), https://github.com/facebook/rocksdb/releases/tag/v8.11.5

So we can go back to version based approach. This PR does that.

100K running: 20260122-001902-praza-fdb-7.4-rocksdb-8.11.-04e8014b8255b29a compressed=True data_size=40238024 duration=5066335 ended=100000 fail_fast=10 max_runs=100000 pass=100000 priority=100 remaining=0 runtime=2:37:11 sanity=False started=100000 stopped=20260122-025613 submitted=20260122-001902 timeout=5400 username=praza-fdb-7.4-rocksdb-8.11.5-97a59accef3674ab24406ebe41d5cb6a50af4d8d

Also ensured fdbserver --version reports correct output:

FoundationDB 7.4 (v7.4.6)
source version 97a59accef3674ab24406ebe41d5cb6a50af4d8d
protocol fdb00b074000000
rocksdb 8.11.5

Code-Reviewer Section

The general pull request guidelines can be found here.

Please check each of the following things and check all boxes before accepting a PR.

• The PR has a description, explaining both the problem and the solution.
• The description mentions which forms of testing were done and the testing seems reasonable.
• Every function/class/actor that was touched is reasonably well documented.

For Release-Branches

If this PR is made against a release-branch, please also check the following:

• This change/bugfix is a cherry-pick from the next younger branch (younger release-branch or main if this is the youngest branch)
• There is a good reason why this PR needs to go into a release branch and this reason is documented (either in the description above or in a linked GitHub issue)

[foundationdb-ci]

Result of foundationdb-pr-clang-arm on Linux CentOS 7

• Commit ID: 97a59ac
• Duration 0:51:55
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Log terminal output (available for 30 days)
• Build Workspace zip file of the working directory (available for 30 days)

[foundationdb-ci]

Result of foundationdb-pr-clang on Linux RHEL 9

• Commit ID: 97a59ac
• Duration 1:00:51
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Log terminal output (available for 30 days)
• Build Workspace zip file of the working directory (available for 30 days)

[foundationdb-ci]

Result of foundationdb-pr on Linux RHEL 9

• Commit ID: 97a59ac
• Duration 1:05:19
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Log terminal output (available for 30 days)
• Build Workspace zip file of the working directory (available for 30 days)

[neethuhaneesha]

Did you check the downgrade from versions 8.11.5 to 8.11.4 ? Just to ensure we are not seeing any issues.

[foundationdb-ci]

Result of foundationdb-pr-cluster-tests on Linux RHEL 9

• Commit ID: 97a59ac
• Duration 2:17:17
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Log terminal output (available for 30 days)
• Build Workspace zip file of the working directory (available for 30 days)
• Cluster Test Logs zip file of the test logs (available for 30 days)

[spraza]

Did you check the downgrade from versions 8.11.5 to 8.11.4 ? Just to ensure we are not seeing any issues.

I have initial positive signal from simulation i.e. 20260122-001902-praza-fdb-7.4-rocksdb-8.11.-04e8014b8255b29a has downgrade tests that go from this PR (rocksdb 8.11.5) to fdb 7.3 (rocksdb 8.11.4). I'm also planning to test in perf cluster before cutting 7.4 release.

[spraza]

Mac build has a known issue. 100K and other signals are green so merging.