Upgrade go version to 1.18

[niladrih]

Signed-off-by: Niladri Halder niladri.halder26@gmail.com

What type of PR is this?
/kind enhancement

What this PR does / why we need it:
This PR upgrades the go version to 1.18 from 1.12. This removes the vendor directory.

Which issue(s) this PR fixes:
Fixes #1323

Test Report Added?:
/kind NOT-TESTED

Test Report:
N/A

Special notes for your reviewer:
#SODACODE2022

[codecov]

Codecov Report

Merging #1324 (2dec741) into master (a689e17) will increase coverage by 0.20%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1324      +/-   ##
==========================================
+ Coverage   38.93%   39.13%   +0.20%     
==========================================
  Files          53       53              
  Lines        6966     9615    +2649     
==========================================
+ Hits         2712     3763    +1051     
- Misses       3739     5337    +1598     
  Partials      515      515              

Impacted Files	Coverage Δ
pkg/db/drivers/etcd/client.go	0.00% <ø> (ø)
pkg/utils/urls/urls.go	39.58% <0.00%> (-8.70%)	⬇️
client/fake.go	41.76% <0.00%> (-4.10%)	⬇️
osdsctl/cli/profile.go	66.66% <0.00%> (-3.55%)	⬇️
osdsctl/cli/version.go	59.09% <0.00%> (-3.41%)	⬇️
osdsctl/cli/volumeattachment.go	70.51% <0.00%> (-3.26%)	⬇️
osdsctl/cli/pool.go	78.57% <0.00%> (-3.25%)	⬇️
osdsctl/cli/dock.go	78.04% <0.00%> (-3.21%)	⬇️
osdsctl/cli/volumegroup.go	80.64% <0.00%> (-3.14%)	⬇️
osdsctl/cli/fileshare.go	80.00% <0.00%> (-3.14%)	⬇️
... and 44 more

[sushanthakumar]

@himanshuvar @PravinRanjan10 , pls have a look

[sushanthakumar]

#SODACODE-PR-ACCEPTED
This PR is accepted for SODACODE 2022. But merge will be done after appropriate testing as it involves many file changes.
Thanks @niladrih for the contribution