chore: Revert DHIS2-15246 and new security config

[netroms]

Summary

This PR reverts the removal of OAuth2 in 2.41 from Jira DHIS2-15246.
It also reverts the changes made in the #15727, related to migration of the Spring security deprecated configuration methods, since this is not compatible with the now reverted removal of the deprecated OAuth2 features.

[github-advanced-security]

CodeQL found more than 20 potential problems in the proposed changes. Check the Files changed tab for more details.

[sonarcloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
3 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

Attention: 146 lines in your changes are missing coverage. Please review.

Comparison is base (83ad6f9) 66.53% compared to head (55d4199) 66.48%.
Report is 3 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #16214      +/-   ##
============================================
- Coverage     66.53%   66.48%   -0.06%     
- Complexity    31695    31701       +6     
============================================
  Files          3519     3528       +9     
  Lines        131331   131311      -20     
  Branches      15303    15306       +3     
============================================
- Hits          87384    87305      -79     
- Misses        36818    36871      +53     
- Partials       7129     7135       +6     

Flag	Coverage Δ
integration	50.11% <15.01%> (+0.04%)	⬆️
integration-h2	32.62% <43.68%> (-0.08%)	⬇️
unit	30.35% <3.41%> (+0.01%)	⬆️

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

Files	Coverage Δ
...g/hisp/dhis/security/oauth2/OAuth2ClientStore.java	100.00% <100.00%> (ø)
...i/src/main/java/org/hisp/dhis/sqlview/SqlView.java	91.89% <100.00%> (ø)
...y/oauth2/hibernate/HibernateOAuth2ClientStore.java	100.00% <100.00%> (ø)
...ava/org/hisp/dhis/schema/DefaultSchemaService.java	93.72% <100.00%> (+0.02%)	⬆️
...hema/descriptors/OAuth2ClientSchemaDescriptor.java	100.00% <100.00%> (ø)
...dhis/webapi/controller/OAuth2ClientController.java	100.00% <100.00%> (ø)
...th2/OAuth2AuthorizationServerEnabledCondition.java	0.00% <0.00%> (ø)
...is/security/oauth2/DefaultOAuth2ClientService.java	40.00% <40.00%> (ø)
...va/org/hisp/dhis/security/oauth2/OAuth2Client.java	69.56% <69.56%> (ø)
...api/oprovider/DhisOauthAuthenticationProvider.java	29.41% <29.41%> (ø)
... and 4 more

... and 14 files with indirect coverage changes

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