[MINOR][CI] Raise federated request timeout for multitenant Spark tests

[Baunsgaard]

The **.functions.federated.monitoring.**,**.functions.federated.multitenant.** CI shard has been intermittently failing and, when reruns pile up, timing out at the 30-minute job cap (e.g. run 28041416088).

Root cause: the multi-tenant test config pins sysds.federated.timeout to 16s. This value bounds both federated instruction execution (FederationMap/FederatedData) and end-of-run stats collection (FederatedStatistics.collectFedStats). For the Spark-backed (*SP) variants of the reuse tests, Spark context creation alone is ~14s, so under shared CI load a single federated request regularly exceeds 16s and throws TimeoutException:

• SPARK°rightIndex°… DMLRuntimeException -- java.util.concurrent.TimeoutException
• Exception … thrown while getting the federated stats of the federated response

The spurious timeouts make FederatedReuseReadTest.testModifiedValLineageSP and FederatedSerializationReuseTest.testRowSumsSP fail; surefire then reruns each failing test, and the accumulated rerun time repeatedly pushes the shard past the 30-minute cap, cancelling the whole job.

This bumps the timeout to 60s: still a hard bound on a genuinely runaway request (the suite cannot hang silently — the reason it was lowered from 128 → 16 in 8f5a42c0), but enough headroom for the Spark variants to pass on the first attempt, which also removes the expensive reruns and brings the shard comfortably back under the time cap.

Evidence (recurring flake, last ~2 weeks)

Same two tests, same TimeoutException signature, across independent runs:

Run	Date	Failing test(s)
27910160773	Jun 21	testModifiedValLineageSP, testRowSumsSP
27645002589	Jun 16	testModifiedValLineageSP
27542041413	Jun 15	testModifiedValLineageSP, testPlusScalarCP, testRowSumsSP
27363185073	Jun 11	testModifiedValLineageSP, `testRow

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.51%. Comparing base (3871809) to head (f02420a).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2505      +/-   ##
============================================
+ Coverage     71.45%   71.51%   +0.06%     
- Complexity    48864    48947      +83     
============================================
  Files          1573     1573              
  Lines        189239   189334      +95     
  Branches      37128    37149      +21     
============================================
+ Hits         135215   135406     +191     
+ Misses        43576    43456     -120     
- Partials      10448    10472      +24     

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