Remove signing from Jenkins MSI pipeline

(cherry picked from commit 08415a98f693b3b7c2de693dc107659e1353cf53)

Remove signing from Jenkins PKG/MSI pipelines

It's handled differently now.

Fix early return in Process.Start (mono#20833)

Co-authored-by: Ryan Lucia <[email protected]>

Use explicit arithmetic checks in the amd64 watchOS simulator. (mono#…

…20647)

Fixes mono#20632.

Backport of mono#20639.

Co-authored-by: Imran Hameed <[email protected]>

Bump bockbuild for gtk+ patch

See mono/bockbuild#166

[runtime] Avoid checking for hardened runtime on ios, its not needed,…

… and it causes alerts because of PROT_WRITE|PROT_EXEC. (mono#20623)

Co-authored-by: Zoltan Varga <[email protected]>

Fix iOS sdks build on Xcode 12 (mono#20574)

The new Xcode introduced functions like preadv/pwritev in the SDK that get erraneously detected by autoconf even though we can't use them.
Disable these functions and also add a check for Xcode version to workaround mono#19393.

Co-authored-by: Alexander Köplinger <[email protected]>

[2020-02] Build makefile to support Mac Catalyst (mono#20566)

Backport of mono#20537.

Co-authored-by: Frank A. Krueger <[email protected]>
Co-authored-by: Alexander Köplinger <[email protected]>

Add support for OP_FCONV_TO_I to mini-arm64.c. (mono#20548)

Partial backport of mono#20100.

Should fix mono#20533.

Also see:
dotnet/runtime#35008 (comment)

Fix potential crash for Encoder.Convert (mono#20522)

GetByteCount will not return the right number of bytes needed, so GetBytes in Encoder.Convert will crash for some input

Backport of mono#20271.

Co-authored-by: jeffgoku <[email protected]>