fix: fallback buildv1 when no okteto file detected

[AdrianPedriza]

Signed-off-by: adripedriza adripedriza@gmail.com

Proposed changes

• Create new error -> no content detected as okteto file
• if we cannot detect any content from the build file then -> fallbackv1

[codecov]

Codecov Report

Merging #2754 (7a7d597) into master (3043140) will increase coverage by 0.00%.
The diff coverage is 28.57%.

@@           Coverage Diff           @@
##           master    #2754   +/-   ##
=======================================
  Coverage   31.91%   31.91%           
=======================================
  Files         158      158           
  Lines       18574    18580    +6     
=======================================
+ Hits         5927     5929    +2     
- Misses      11947    11950    +3     
- Partials      700      701    +1     

Impacted Files	Coverage Δ
pkg/model/manifest.go	14.80% <28.57%> (+0.16%)	⬆️

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