ci: use more durable version detection in some iast benchmarks (#15259)

## Description

These benchmarks used `_version` directly, which isn't present when the
version string is hardcoded in pyproject.toml.

Author: emmettbutler

benchmarks/appsec_iast_aspects/functions.py

@@ -2,9 +2,11 @@
 import os
 import re
 
-import ddtrace._version as version
+from ddtrace import get_version
 
 
+version = get_version()
+
 # Some old versions could not have or export some symbols, so we import them dynamically and assign None if not found
 # which will make the aspect benchmark fail but not the entire benchmark
 symbols = [

benchmarks/appsec_iast_aspects_ospath/functions.py

@@ -2,9 +2,11 @@
 import os
 import re
 
-import ddtrace._version as version
+from ddtrace import get_version
 
 
+version = get_version()
+
 # Some old versions could not have or export some symbols, so we import them dynamically and assign None if not found
 # which will make the aspect benchmark fail but not the entire benchmark
 symbols = [

benchmarks/appsec_iast_aspects_re_module/functions.py

@@ -2,9 +2,11 @@
 import os
 import re
 
-import ddtrace._version as version
+from ddtrace import get_version
 
 
+version = get_version()
+
 # Some old versions could not have or export some symbols, so we import them dynamically and assign None if not found
 # which will make the aspect benchmark fail but not the entire benchmark
 symbols = [

benchmarks/appsec_iast_aspects_split/functions.py

@@ -2,9 +2,11 @@
 import os
 import re
 
-import ddtrace._version as version
+from ddtrace import get_version
 
 
+version = get_version()
+
 # Some old versions could not have or export some symbols, so we import them dynamically and assign None if not found
 # which will make the aspect benchmark fail but not the entire benchmark
 symbols = [