Sloeber does not tag the compiler error "g++: error: ..file_opts: No such file or directory" as an error

[jantje]

As reported in #1694

[jantje]

Investigating this issue I found that the error count is not always zero.
The reported case is actually caused by ESP32 2.0.14 and the file_opts error.
The compiler givers the error but the error does not get recognized by the error parser.
xtensa-esp32s3-elf-g++: error: R:\runtime-sloeber.product\test\bin\Release/file_opts: No such file or directory
On top of that the internal builder does not skip the post build action resulting in hiding the error.

As I don't know how to fix the error parser (standard CDT component) and that is also a issue in Sloeber V4 I decided to dedicate this issue (probably won't fix) to the not reported error and create a new issue V5 isssue for the post build commands not being skipped in case of an error.

[jantje]

Seems you can add regular expressions to the error parsers but I failed to get the error to be recognized.