makefile go build && go mod tidy behaves differently starting with Go 1.21, leading to unknown directive toolchain errors

[Stan370]

Feature Request

Short Description

My local go version is 1.18.1. When I run make or go mod tidy, it shows

cd /home/stan/KubeArmor/KubeArmor; make -C ../protobuf
make[1]: Entering directory '/home/stan/KubeArmor/protobuf'
go get .
go: errors parsing go.mod:
/home/stan/KubeArmor/protobuf/go.mod:5: unknown directive: toolchain
make[1]: *** [Makefile:13: go.sum] Error 1
make[1]: Leaving directory '/home/stan/KubeArmor/protobuf'
make: *** [Makefile:43: protobuf] Error 2

---------
go: errors parsing go.mod:
/home/stan/KubeArmor/KubeArmor/go.mod:5: unknown directive: toolchain

**Is your feature request related to a problem? User with go version lower than 1.21 try to build the KubeArmor.

A description of what the problem/use case is.

Describe the solution you'd like

After update Go module version to 1.21 and use toolchain directive. Any previous CI/CD process, or any other developer in the team that's using a different version of go can no longer build/test/run the code because of the toolchain directive.The go directive sets the minimum version of Go required to use this module. Before Go 1.21, the directive was advisory only; now it is a mandatory requirement: Go toolchains refuse to use modules declaring newer Go versionshttps://go.dev/doc/toolchain

I have researched and consulted the compatibility concerns outlined in the GitHub issue and the discussion on Hacker News (https://news.ycombinator.com/item?id=36455694). We should set GOTOOLCHAIN to local.Or add a GOFLAGS directive at the top of the file, specifying the -go flag to set the GOTOOLCHAIN environment variable:

When GOTOOLCHAIN is set to local, the go command always runs the bundled Go toolchain.

Describe alternatives you've considered

A description of any alternative solutions or features you've considered. E.g, Alternatively, KubeArmor could shower flower petals on alien invaders and win their hearts with humanity.

[EraKin575]

please assign this task to me