Build supervisor with xgo

[zolia]

should fix #2314
Packaging on MacOS is running fine, thats why we missed probably.
We prob need to cross compile anyways.

[tadaskay]

We are already crosscompiling and we don't need xgo for the supervisor. The proper way would be to use a separate go.mod for that sub-project instead of trying to work around go-ethereum quirks (which supervisor does not need at all).

[vkuznecovas]

I'm with Tadas on this one. If we use XGO it's going to prolong our build times by quite a lot.

[zolia]

We are using xgo for building node atm anyways. I agree that we should migrate to cgo, but there is problem with go-ethereum - again. I suggest to follow this PR to be approved: ethereum/go-ethereum#21041 and bump etherium dependency then.

For now I suggest to merge as it is.

[tadaskay]

I'll try to fix it, please don't merge

[codecov-commenter]

Codecov Report

Merging #2318 into master will increase coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2318      +/-   ##
==========================================
+ Coverage   48.06%   48.11%   +0.05%     
==========================================
  Files         281      281              
  Lines       12989    12989              
==========================================
+ Hits         6243     6250       +7     
+ Misses       6147     6140       -7     
  Partials      599      599              

Impacted Files	Coverage Δ
tequilapi/endpoints/sse_handler.go	72.17% <0.00%> (-2.61%)	⬇️
session/pingpong/invoice_tracker.go	66.13% <0.00%> (+0.63%)	⬆️
nat/traversal/pinger.go	72.33% <0.00%> (+3.88%)	⬆️

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[zolia]

fixed by 924532c and do not depend on go-ethereum in supervisor. Closing this PR since major refactoring is needed here and best to move to mage format in order to eliminate excessive duplications.