release-25.1: logictest: raise TxnLivenessThreshold for multitenant configs

[blathers-crl]

Backport 1/1 commits from #140607 on behalf of @rafiss.

/cc @cockroachdb/release

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Logic tests are flaky due to overload when running in multitenant mode. This patch increases the threshold for transaction heartbeat timeouts, which will make it less likely for foreground operations to be aborted by background jobs like the span config reconciler or the job registry loop to reclaim jobs from dead sessions.

fixes #140597
fixes #140494
fixes #140578
fixes #140577
fixes #140572
fixes #140574
fixes #139890
fixes #140565
fixes #140542
fixes #140543
fixes #140545
fixes #140544
fixes #140546
fixes #140560
fixes #140552
fixes #140541
fixes #140553
fixes #139990
fixes #139776
fixes #140072
fixes #139761
fixes #140161
fixes #140063
fixes #140062
fixes #140011
fixes #140605
fixes #140614
fixes #140608

Release note: None

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Release justification: test only change

[blathers-crl]

Thanks for opening a backport.

Please check the backport criteria before merging:

• Backports should only be created for serious
  issues or test-only changes.
• Backports should not break backwards-compatibility.
• Backports should change as little code as possible.
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• Backports should not add new functionality (except as defined
  here).
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  policy.

If your backport adds new functionality, please ensure that the following additional criteria are satisfied:

• There is a high priority need for the functionality that cannot wait until the next release and is difficult to address in another way.
• The new functionality is additive-only and only runs for clusters which have specifically “opted in” to it (e.g. by a cluster setting).
• New code is protected by a conditional check that is trivial to verify and ensures that it only runs for opt-in clusters. State changes must be further protected such that nodes running old binaries will not be negatively impacted by the new state (with a mixed version test added).
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  channel (#db-backports-point-releases or #db-backports-XX-X-release) for awareness and discussion.

Also, please add a brief release justification to the body of your PR to justify this
backport.

[cockroach-teamcity]

This change is 

[fqazi]

Reviewed 2 of 2 files at r1, all commit messages.
Reviewable status: complete! 1 of 0 LGTMs obtained (waiting on @yuzefovich)