Test

.github/workflows: add tests for Go 1.26-rc.1 #7104

Job	Run time
Test WebAssembly with Go 1.24.x	1m 56s
Test WebAssembly with Go 1.25.x	2m 4s
Test WebAssembly with Go 1.26.0-rc.1	2m 40s
Test with Go 1.26.0-rc.1 on macos-latest	4m 37s
Test with Go 1.25.x on ubuntu-latest	4m 31s
Test with Go 1.24.x on macos-latest	4m 36s
Test with Go 1.26.0-rc.1 on ubuntu-latest	4m 16s
Test with Go 1.26.0-rc.1 on windows-latest	4m 30s
Test with Go 1.24.x on ubuntu-latest	4m 33s
Test with Go 1.25.x on windows-latest	4m 29s
Test with Go 1.25.x on macos-latest	4m 36s
Test with Go 1.24.x on windows-latest	4m 29s
	47m 17s

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