[Feature]: Make local terminal cores configurable

[link3280]

Why are the changes needed?

As titled.

Brief change log

As titled.

How was this patch tested?

• Add some test cases that check the changes thoroughly including negative and positive cases if possible

• Add screenshots for manual tests if appropriate

• Run test locally before making a pull request

Documentation

• Does this pull request introduce a new feature? no
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (818cc20) 32.65% compared to head (5971b3e) 32.65%.
Report is 1 commits behind head on master.

Files	Patch %	Lines
...tic/server/terminal/local/LocalSessionFactory.java	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #2492   +/-   ##
=========================================
  Coverage     32.65%   32.65%           
+ Complexity     4484     4483    -1     
=========================================
  Files           599      599           
  Lines         50310    50313    +3     
  Branches       6689     6689           
=========================================
+ Hits          16428    16429    +1     
- Misses        32566    32568    +2     
  Partials       1316     1316           

Flag	Coverage Δ
core	30.76% <50.00%> (-0.01%)	⬇️
trino	50.93% <ø> (+0.06%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[zhoujinsong]

@link3280 I left some comments, please take a look.

Besides, I found there are no docs about the configurations of terminals, it will make users hard to get these configurations.

Maybe we should add some description in docs and examples in default configuration files, how do you think? @link3280

[zhoujinsong]

It seems to be a configuration only for the local terminal.
If yes, we may want to move it into LocalSessionFactory and name it cores because the TerminalManager will reorganize configurations based on different backend types.

You can find similar configurations only for the Kyuubi terminal in KyuubiTerminalSessionFactory.

[link3280]

I agree that LocalSessionFactory is a better place for the config option. But do you think cores should be prefixed with the terminal type local, as it's only effective for the local terminal. That makes the full key terminal.local.cores.

[zhoujinsong]

Sorry, my previous description was not clear. The complete configuration name in the configuration file should indeed be terminal.local.cores. Just as you have implemented, in the code, we only need to name the configuration cores, and TerminalManager will handle the decomposition of different backend configurations.

[zhoujinsong]

LGTM.

[zhoujinsong]

I created #2496 to follow the docs issues.