Change build files and artefacts to java 11

[melowe]

No description provided.

[codecov-io]

Codecov Report

Merging #978 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #978      +/-   ##
============================================
- Coverage     99.31%   99.31%   -0.01%     
  Complexity     2181     2181              
============================================
  Files           329      329              
  Lines          5951     5948       -3     
  Branches        355      354       -1     
============================================
- Hits           5910     5907       -3     
  Misses            5        5              
  Partials         36       36

Impacted Files	Coverage Δ	Complexity Δ
...ra/cli/keypassresolver/CliKeyPasswordResolver.java	97.82% <0%> (-0.05%)	20% <0%> (ø)
...uorum/tessera/data/migration/JdbcDataExporter.java	100% <0%> (ø)	4% <0%> (ø)	⬇️
...rum/tessera/data/migration/SqliteDataExporter.java	100% <0%> (ø)	4% <0%> (ø)	⬇️

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