DAOS-18477 test: container/boundary.py: 26 pool create threads failed…

[dinghwah]

…: DER_NOSPACE(-1007)

Update pool scm_size to 200G

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 'container/boundary.py: 26 pool create threads failed: DER_NOSPACE(-1007): No space on storage target'
Status is 'Open'
https://daosio.atlassian.net/browse/DAOS-18477

[daosbuild3]

Test stage Functional Hardware Large MD on SSD completed with status UNSTABLE. https://jenkins-3.daos.hpc.amslabs.hpecorp.net/job/daos-stack/job/daos//view/change-requests/job/PR-17452/1/testReport/