tree-wide: drop deprecated io/ioutil

[mythi]

Go 1.16 release notes announced the deprecation of io/ioutil [1]. It's easy
for us to move to use what is was recommended so just do it.

[1] https://golang.org/doc/go1.16#ioutil

Closes: #612

Signed-off-by: Mikko Ylinen mikko.ylinen@intel.com

[bart0sh]

/lgtm

[eero-t]

This seems a bit pre-mature as this change is supported only from Go v1.16 onward.

(CI seems to be still at v1.15, Debian testing is still at v1.15, Ubuntu supports v1.16 only from 21.04 onwards (released last month), and e.g. Fedora 33 is also still at Go v1.15.)

[mythi]

This seems a bit pre-mature as this change is supported only from Go v1.16 onward.

We have plans to move to v1.16 but need the base image conversion done first (so that we can pull golang:1.16-buster). I'll finish this and bump up the CI versions afterwards.

[codecov-commenter]

Codecov Report

Merging #630 (771eac3) into main (a207bfe) will decrease coverage by 0.13%.
The diff coverage is 84.00%.

❗ Current head 771eac3 differs from pull request most recent head 57372bf. Consider uploading reports for the commit 57372bf to get more accurate results

@@            Coverage Diff             @@
##             main     #630      +/-   ##
==========================================
- Coverage   57.75%   57.61%   -0.14%     
==========================================
  Files          31       31              
  Lines        2192     2192              
==========================================
- Hits         1266     1263       -3     
- Misses        853      855       +2     
- Partials       73       74       +1     

Impacted Files	Coverage Δ
pkg/fpga/bitstream/aocx.go	8.79% <0.00%> (ø)
pkg/fpga/fpga_linux.go	0.00% <0.00%> (ø)
pkg/fpga/utils.go	0.00% <0.00%> (ø)
cmd/qat_plugin/kerneldrv/kerneldrv.go	73.79% <50.00%> (ø)
cmd/fpga_plugin/fpga_plugin.go	69.86% <100.00%> (ø)
cmd/gpu_nfdhook/labeler.go	70.21% <100.00%> (ø)
cmd/gpu_plugin/gpu_plugin.go	85.00% <100.00%> (ø)
cmd/qat_plugin/dpdkdrv/dpdkdrv.go	86.36% <100.00%> (ø)
cmd/vpu_plugin/vpu_plugin.go	70.63% <100.00%> (ø)
pkg/idxd/plugin.go	56.96% <100.00%> (ø)
... and 2 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a207bfe...57372bf. Read the comment docs.

[mythi]

@bart0sh @rojkov ready for review/merge

[uniemimu]

LGTM

[rojkov]

@kad could you please merge?

[kad]

lgtm