[Chore](build) add a environment variable DISABLE_JAVA_UDF

[BiteTheDDDDt]

Proposed changes

Currently we have no way to compile the backend without java-udf, which will cause us to spend 50s more per compilation, so I added an environment variable that disables java-udf.

Problem summary

Describe your changes.

Checklist(Required)

1. Does it affect the original behavior:
   • Yes
   • No
   • I don't know
2. Has unit tests been added:
   • Yes
   • No
   • No Need
3. Has document been added or modified:
   • Yes
   • No
   • No Need
4. Does it need to update dependencies:
   • Yes
   • No
5. Are there any changes that cannot be rolled back:
   • Yes (If Yes, please explain WHY)
   • No

Further comments

If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...

[Gabriel39]

LGTM

[github-actions]

sh-checker report

To get the full details, please check in the job output.

shellcheck errors

'shellcheck ' returned error 1 finding the following syntactical issues:

----------

In build.sh line 292:
if [[ "${DISABLE_JAVA_UDF}" == "ON" ]]; then
       ^-----------------^ SC2154 (warning): DISABLE_JAVA_UDF is referenced but not assigned.

For more information:
  https://www.shellcheck.net/wiki/SC2154 -- DISABLE_JAVA_UDF is referenced bu...
----------

You can address the above issues in one of three ways:
1. Manually correct the issue in the offending shell script;
2. Disable specific issues by adding the comment:
  # shellcheck disable=NNNN
above the line that contains the issue, where NNNN is the error code;
3. Add '-e NNNN' to the SHELLCHECK_OPTS setting in your .yml action file.

shfmt errors

'shfmt ' found no issues.

[Gabriel39]

LGTM