Refactors and fixes

[lukamac]

This PR is a collection of refactors and fixes I've done while working on the parser refactor.
Each commit holds a small change so best reviewed commit-by-commit.

Changed

• ref naming scheme in Gemm and FloatGemm templates from ${data_out}_${<tensor>} to ${nodeName}_${<tensor>}
• bunch of small refactors
• move iNoNorm from Generic to Snitch since it uses a Snitch kernel

Fixed

• formatting of test_input/output integer values
• pulp rqs tile constraints now properly target the last dimension of rqs params

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