Geo: Fix File synchronization concurrency limit

What does this MR do and why?

Since all "file/blob" types are now handled by SSF, it should use all of "File synchronization concurrency limit".

Before:

• Set "File synchronization concurrency limit" to X
• The secondary site limits the number of concurrent file replication jobs to X/2

After:

• Set "File synchronization concurrency limit" to X
• The secondary site limits the number of concurrent file replication jobs to X

Risks:

• Upon upgrade, the possible peak number of concurrent file replication jobs will double.

This resolves #373320 (closed)

MR acceptance checklist

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