Update semantic convention constants generator script and template

The template was updated to reflect the changes introduced in otel/semconvgen v0.3.0 and v0.3.1.
The script was updated to pin the version of the otel/semconvgen image, otherwise incompatible updates would break it.

Fixes open-telemetry#3042.

buildscripts/semantic-convention/generate.sh

@@ -4,7 +4,8 @@ SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 ROOT_DIR="${SCRIPT_DIR}/../../"
 
 # freeze the spec version to make SemanticAttributes generation reproducible
-SPEC_VERSION=v1.1.0
+SPEC_VERSION=a44d863edcdef63b0adce7b47df001933b7a158a # = v1.1.0 + number->int update; bump to v1.2.0 once released
+GENERATOR_VERSION=0.3.1
 
 cd ${SCRIPT_DIR}
 
@@ -22,7 +23,7 @@ docker run --rm \
  -v ${SCRIPT_DIR}/opentelemetry-specification/semantic_conventions/trace:/source \
  -v ${SCRIPT_DIR}/templates:/templates \
  -v ${ROOT_DIR}/semconv/src/main/java/io/opentelemetry/semconv/trace/attributes/:/output \
- otel/semconvgen \
+ otel/semconvgen:${GENERATOR_VERSION} \
  -f /source code \
  --template /templates/SemanticAttributes.java.j2 \
  --output /output/SemanticAttributes.java \
@@ -33,7 +34,7 @@ docker run --rm \
  -v ${SCRIPT_DIR}/opentelemetry-specification/semantic_conventions/resource:/source \
  -v ${SCRIPT_DIR}/templates:/templates \
  -v ${ROOT_DIR}/semconv/src/main/java/io/opentelemetry/semconv/resource/attributes/:/output \
- otel/semconvgen \
+ otel/semconvgen:${GENERATOR_VERSION} \
  -f /source code \
  --template /templates/SemanticAttributes.java.j2 \
  --output /output/ResourceAttributes.java \

buildscripts/semantic-convention/templates/SemanticAttributes.java.j2

@@ -11,7 +11,7 @@
  List<String>
  {%- elif type == "boolean" -%}
  boolean
- {%- elif type == "number" -%}
+ {%- elif type == "int" -%}
  long
  {%- else -%}
  {{type}}
@@ -24,7 +24,7 @@
  stringArrayKey
  {%- elif type == "boolean" -%}
  booleanKey
- {%- elif type == "number" -%}
+ {%- elif type == "int" -%}
  longKey
  {%- else -%}
  {{lowerFirst(type)}}Key