[hexagon] Add hexagon tests to lint

[mehrdadh]

Let's add hexagon tests to link step to avoid issues like this:
#12565

[mehrdadh]

@quic-sanirudh I see that you claimed almost all hexagon tests, please let me know if you want to offload some.

#11414

[quic-sanirudh]

@quic-sanirudh I see that you claimed almost all hexagon tests, please let me know if you want to offload some.

#11414

@mehrdadh Yes I took it up to do it in my spare time and I've pushed a couple PRs to fix linter for a few files, but haven't started working on the rest. Please feel free to pick up any of the remaining ones, thanks.

[masahi]

I think this has been completed.