MDBF-406: disable valgrind in 11.4+

[grooverdan]

Valgrind is a large consumer of BB resources.
It hasn't found a bug that msan hasn't for years.

MSAN and ASAN's fluctuating timings are useful
to expose the varying test cases to additional coverage.

With MSAN being a bit for bit mapping single bit errors are found.

Valgrind BB branches are only green on 10.6 and 10.11 with later branches having test case failures that haven't been corrected in almost a year.

Valgrind remains a useable option without its presence in BB.

Template selection

Please go the the Preview tab and select the appropriate sub-template:

• Adding Worker Machine
• Adding a New Build

[RazvanLiviuVarzaru]

Hi, @grooverdan !

Thanks for the patch and the analysis of the builder.
I know that Monty really wanted this builder, and at the moment I’m not sure whether he still has plans for it. Could you please discuss your findings with him? If he no longer needs the builder on all branches, then sure, let’s go ahead and merge it.