Add "repackage" goal to create fat jar

[rujche]

Purpose

To fix this problem:

$ java \
--module-path ./azure-security-keyvault-jca-2.8.2.jar \
--add-modules com.azure.security.keyvault.jca \
-Dsecurity.overridePropertiesFile=true \
-Djava.security.properties==./java.security \
-Dazure.keyvault.uri=xxx \
-Dazure.keyvault.tenant-id=xxx \
-Dazure.keyvault.client-id=xxx \
-Dazure.keyvault.client-secret=xxx \
-jar run-with-command-line-server-side-1.0.0.jar \
--server.port=8443 \
--server.ssl.enabled=true \
--server.ssl.key-alias=pfxchain \
--server.ssl.keystore-type=DKS \
--server.ssl.keyStoreProvider=AzureKeyVault \
--server.ssl.key-store=classpath:keyvault.dummy
no main manifest attribute, in run-with-command-line-server-side-1.0.0.jar

Does this introduce a breaking change?

[] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

Just run the steps in https://github.com/Azure-Samples/azure-spring-boot-samples/blob/main/keyvault/azure-securtiy-keyvault-jca/run-with-command-line-server-side/README.md

What to Check

Verify that there is no error like no main manifest attribute, in run-with-command-line-server-side-1.0.0.jar.

Other Information

[rujche]

/check-enforcer override

[rujche]

HI, @saragluna

1. Please help to approve this PR again.
2. The check failure is not cause by the change in this PR. We can fix it in another PR.