bazelrc: Disable building llvm with zstd

Disable building llvm with zstd to avoid conflicts with newly-added zstd
library. It seems that llvm_zstd is not necessary for correct llvm
operation.

Internal-tag: #[49966]
Signed-off-by: Robert Winkler <rwinkler@antmicro.com>

.bazelrc

@@ -19,6 +19,7 @@ build --host_copt "-Wno-comment"
 # https://github.com/google/googletest/issues/4383
 build --define absl=1
 build --incompatible_enable_cc_toolchain_resolution
+build --@llvm_zstd//:llvm_enable_zstd=false
 
 # Settings for --config=asan address sanitizer build
 build:asan --strip=never