fix: memory allocation of standalone mode

[fuyufjh]

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What's changed and what's your intention?

Resolves #19472 by introducing a configurable memory-manager-target-bytes, and updated the docker-compose.yamls to use it.

Checklist

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Release note

If this PR includes changes that directly affect users or other significant modifications relevant to the community, kindly draft a release note to provide a concise summary of these changes. Please prioritize highlighting the impact these changes will have on users.

[chenzl25]

LGTM

[MrCroxx]

LGTM

[wcy-fdu]

LGTM

[Li0k]

#19245

[Li0k]

LGTM