Improve 'Replace All' performance.

[raghucssit]

For Large Java file 'Replace All' takes long time and freezes the UI. One of the reason is Projection Model tries to iterate over all the Projection Annotations to expand/collapse status.
We can improve this situation by using Region specific iterator. This returns annotations which are enclosed by given offset. This improves the performance by 25% at least.

See #2257

[raghucssit]

@iloveeclipse FYI.

[raghucssit]

Performance Data:
Please use the generator attached in the issue. It generates 20k inner classes with a method in it. A total 40k annotations.
and 20k occurrence of replace string.
In this example:
Without Fix: Always >40 Seconds
With Fix: Always <30 seconds.

My machine configuration:
Processor: 16 × Intel® Xeon® W-2245 CPU @ 3.90GHz
Memory: 125.0 GiB of RAM
OS: RHEL 9.2

[github-actions]

Test Results

 1 815 files  ±0   1 815 suites  ±0   1h 30m 13s ⏱️ - 5m 24s
 7 699 tests ±0   7 469 ✅  - 2  228 💤 ±0  2 ❌ +2 
24 258 runs  ±0  23 509 ✅  - 2  747 💤 ±0  2 ❌ +2 

For more details on these failures, see this check.

Results for commit 530fa43. ± Comparison against base commit c603575.

♻️ This comment has been updated with latest results.

[Wittmaxi]

This is something I had suspected but never taken the time to investigate into. Thank you for the contribution, I support it.

[iloveeclipse]

I've just rebased the commit, no other changes

[iloveeclipse]

LGTM