build: add pqarrow_read_only build tags to avoid building write related code (apache#569)

### Rationale for this change

The current binary when built is 20mb. We have a use case in which we
only need to read data from a parquet file and do not need to write any
parquet data out. By Adding build tags to code that is only needed to
write we can save ~12mb off the size of our binary compiled with
arrow-go.

### What changes are included in this PR?

This PR adds the build tag `!pqarrow_read_only` to write related files
in the `pqarrow` package.

### Are these changes tested?

Tested the build locally and against my read only use case.
Added test in `ci/scripts/build.sh`

### Are there any user-facing changes?

No, this change is only for consumers who build `arrow-go` but do not
need write functionality.

Author: jacobromero

arrow/avro/avro2parquet/main.go

@@ -14,6 +14,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build !pqarrow_read_only
+
 package main
 
 import (

ci/scripts/build.sh

@@ -73,3 +73,9 @@ if [[ "${ARROW_INTEGRATION_GO}" = "ON" ]]; then
 
   popd
 fi
+
+pushd "${source_dir}/parquet"
+
+go install -tags pqarrow_read_only ./...
+
+popd

parquet/pqarrow/encode_arrow.go

@@ -14,6 +14,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build !pqarrow_read_only
+
 package pqarrow
 
 import (

parquet/pqarrow/encode_dict_compute.go

@@ -14,7 +14,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build go1.18
+//go:build go1.18 && !pqarrow_read_only
 
 package pqarrow
 

parquet/pqarrow/encode_dict_nocompute.go

@@ -14,7 +14,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build !go1.18
+//go:build !go1.18 && !pqarrow_read_only
 
 package pqarrow
 

parquet/pqarrow/file_writer.go

@@ -14,6 +14,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build !pqarrow_read_only
+
 package pqarrow
 
 import (