Allows to read ingress and egress counter separately

[daniele-moro]

Depends on: https://gerrit.onosproject.org/c/onos/+/25447

This PR consider only the read path. Code partially taken from:

• [SDFAB-1178] Allow and write in/e-gress counter separately #519
• [SDFAB-1175] Allow to modify UPF counters #517

[daniele-moro]

retest this please

[codecov]

Codecov Report

Merging #520 (542a822) into main (5376d8c) will increase coverage by 0.29%.
The diff coverage is 76.47%.

@@             Coverage Diff              @@
##               main     #520      +/-   ##
============================================
+ Coverage     69.92%   70.22%   +0.29%     
- Complexity      739      757      +18     
============================================
  Files            63       63              
  Lines          4802     4820      +18     
  Branches        530      533       +3     
============================================
+ Hits           3358     3385      +27     
+ Misses         1165     1155      -10     
- Partials        279      280       +1     

Impacted Files	Coverage Δ
...abric/tna/behaviour/upf/FabricUpfProgrammable.java	65.06% <76.47%> (+2.92%)	⬆️

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