Expand error checks for receptors datadir

[AaronH88]

Instead of checking for just os.IsNotExist when discovering the receptor datadir, check for any possible error.
This will expand the error checks to permission denied errors also.

[sonarqubecloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (01b1443) 38.10% compared to head (ab7f6b1) 38.14%.

@@            Coverage Diff             @@
##            devel     #931      +/-   ##
==========================================
+ Coverage   38.10%   38.14%   +0.04%     
==========================================
  Files          40       40              
  Lines        7406     7408       +2     
==========================================
+ Hits         2822     2826       +4     
- Misses       4422     4423       +1     
+ Partials      162      159       -3     

Files	Coverage Δ
pkg/workceptor/workceptor.go	48.45% <33.33%> (+0.22%)	⬆️

... and 3 files with indirect coverage changes