Update function definitions for type-related PGX functions

These type-related extension functions are not emitted by PGX, so must
be added to our idempotent scripts in order to point the functions at
the most recent version of our versioned extension binary.

Author: JamesGuthrie

migration/idempotent/014-extension-type-functions.sql

@@ -0,0 +1,21 @@
+-- These type-related extension functions are not emitted by PGX, so must be
+-- added to our idempotent scripts in order to point the functions at the most
+-- recent version of our versioned extension binary.
+
+-- src/aggregates/gapfill_delta.rs:29
+-- promscale::aggregates::gapfill_delta::gapfilldeltatransition_in
+CREATE OR REPLACE FUNCTION _prom_ext."gapfilldeltatransition_in"(
+    "input" cstring /* &cstr_core::CStr */
+) RETURNS _prom_ext.GapfillDeltaTransition /* promscale::aggregates::gapfill_delta::GapfillDeltaTransition */
+    IMMUTABLE PARALLEL SAFE STRICT
+    LANGUAGE c /* Rust */
+AS '$libdir/promscale-0.5.1', 'gapfilldeltatransition_in_wrapper';
+
+-- src/aggregates/gapfill_delta.rs:29
+-- promscale::aggregates::gapfill_delta::gapfilldeltatransition_out
+CREATE OR REPLACE FUNCTION _prom_ext."gapfilldeltatransition_out"(
+    "input" _prom_ext.GapfillDeltaTransition /* promscale::aggregates::gapfill_delta::GapfillDeltaTransition */
+) RETURNS cstring /* &cstr_core::CStr */
+    IMMUTABLE PARALLEL SAFE STRICT
+    LANGUAGE c /* Rust */
+AS '$libdir/promscale-0.5.1', 'gapfilldeltatransition_out_wrapper';