Replace synchronized with ReentrantLock

[jyemin]

In order to get the benefit for structured concurrency, the driver
must use Lock#lockInterruptibly rather than simply Lock#lock.

JAVA-4642

What use of synchronized is left out of this PR?

• Used in the bson module: I didn't include this because MongoInterruptedException is in driver-core, not bson, so it wasn't clear what exception should be thrown. So deferring this for now
• Use in driver-legacy. Generally we don't make improvements in legacy
• Use in threads that the driver starts itself. This can be done later if we ever move these to virtual threads. But also, these threads are not accessible to applications so can't easily be interrupted.
• Use in asynchronous contexts. Structured concurrency wouldn't be used with reactive streams, so it's not needed
• Use in tests. Obviously these are ignorable

[rozza]

Looks good - one DRY and naming improvement suggestion.

[rozza]

LGTM!

[jyemin]

Updated GridFS as well

[katcharov]

LGTM