Support building with Tinygo and target `wasi`

Enable building using the tinygo compiler, together with
the `wasi` target.

This combination requires different handling compared to go >= 1.21
and the `wasip1` target. That's because Tinygo compiles using the
GOOS set to `linux` and the `GOARCH` set to `wasi`.

Signed-off-by: Flavio Castelli <fcastelli@suse.com>

terminal_check_unix.go

@@ -1,5 +1,7 @@
+//go:build (linux || aix || zos) && !js && !wasi
 // +build linux aix zos
 // +build !js
+// +build !wasi
 
 package logrus
 

terminal_check_wasi.go

@@ -0,0 +1,8 @@
+//go:build wasi
+// +build wasi
+
+package logrus
+
+func isTerminal(fd int) bool {
+	return false
+}