[chore] remove need for realpath (open-telemetry#6978)

Use git rev-parse instead.

Fixes open-telemetry#6977

Signed-off-by: Alex Boten <[email protected]>

Author: Alex Boten

internal/buildscripts/compare-apidiff.sh

@@ -14,7 +14,7 @@ usage() {
 package=""
 input_dir="./internal/data/apidiff"
 check_only=false
-apidiff_cmd="$(dirname $(realpath ${BASH_SOURCE:-$0}))/../../.tools/apidiff"
+apidiff_cmd="$(git rev-parse --show-toplevel)/.tools/apidiff"
 
 while getopts "cp:d:" o; do
     case "${o}" in

internal/buildscripts/gen-apidiff.sh

@@ -14,7 +14,7 @@ usage() {
 dry_run=false
 package=""
 output_dir="./internal/data/apidiff"
-apidiff_cmd="$(dirname $(realpath ${BASH_SOURCE:-$0}))/../../.tools/apidiff"
+apidiff_cmd="$(git rev-parse --show-toplevel)/.tools/apidiff"
 
 
 while getopts "dp:o:" o; do