DAOS-18921 tests: avoid MS broken during CR test

[Nasf-Fan]

During CR tests, some rank maybe excluded intentionally. Set enough MS replicas in the configuration file to avoid MS broken during the eviction related CR test cases.

Test-tag: test_daos_cat_recov_core
Skip-nlt: true
Skip-unit-tests: true
Skip-fault-injection-test: true

Steps for the author:

• Commit message follows the guidelines.
• Appropriate Features or Test-tag pragmas were used.
• Appropriate Functional Test Stages were run.
• At least two positive code reviews including at least one code owner from each category referenced in the PR.
• Testing is complete. If necessary, forced-landing label added and a reason added in a comment.

After all prior steps are complete:

• Gatekeeper requested (daos-gatekeeper added as a reviewer).

[github-actions]

Ticket title is 'recovery/cat_recov_core.py:CatRecovCoreTest.test_daos_cat_recov_core - CR29 dmg_pool_create failed, rc: -1025'
Status is 'In Review'
Labels: '2.6.5rc1,daily_test,triaged'
https://daosio.atlassian.net/browse/DAOS-18921

[daltonbohning]

This is what we do already for other daos_test, but shouldn't the default svcn already be at least 3 when we have enough nodes for it? Out of scope for this PR, but maybe we should not default to 1 in the test suite

daos/src/tests/suite/daos_test_common.c

Line 24 in ed111d4

unsigned int svc_nreplicas = 1;