[chore][config/configcompression] Migrate to schema-based configuration (#15489)

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#### Description

Migrated `config/configcompression` from a hand-written Config struct to
`mdatagen` schema-based configuration.

Part of
https://github.com/open-telemetry/opentelemetry-collector/blob/main/docs/rfcs/component-configuration-schema-roadmap.md

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#### Authorship

- [x] I, a human, wrote this pull request description myself.

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---------

Co-authored-by: Evan Bradley <11745660+evan-bradley@users.noreply.github.com>

Author: jkoronaAtCisco

config/configcompression/compressiontype.go

@@ -8,17 +8,6 @@ import (
 	"fmt"
 )
 
-// Type represents a compression method
-type Type string
-
-type Level int
-
-type CompressionParams struct {
-	Level Level `mapstructure:"level"`
-	// prevent unkeyed literal initialization
-	_ struct{}
-}
-
 const (
 	TypeGzip                Type = "gzip"
 	TypeZlib                Type = "zlib"

config/configcompression/config.schema.json

@@ -0,0 +1,33 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "go.opentelemetry.io/collector/config/configcompression",
+  "title": "pkg/config/configcompression",
+  "$defs": {
+    "compression_params": {
+      "type": "object",
+      "properties": {
+        "level": {
+          "type": "integer"
+        }
+      }
+    },
+    "level": {
+      "type": "integer"
+    },
+    "type": {
+      "description": "Type represents a compression method",
+      "type": "string",
+      "enum": [
+        "gzip",
+        "zlib",
+        "deflate",
+        "snappy",
+        "x-snappy-framed",
+        "zstd",
+        "lz4",
+        "none",
+        ""
+      ]
+    }
+  }
+}

config/configcompression/doc.go

@@ -0,0 +1,7 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Generate a test metrics builder from a sample metrics set covering all configuration options.
+//go:generate mdatagen metadata.yaml
+
+package configcompression // import "go.opentelemetry.io/collector/config/configcompression"

config/configcompression/generated_config.go

@@ -5,3 +5,25 @@ github_project: open-telemetry/opentelemetry-collector
 status:
   disable_codecov_badge: true
   class: pkg
+
+exported_configs:
+  compression_params:
+    type: object
+    properties:
+      level:
+        $ref: level
+  level:
+    type: integer
+  type:
+    description: Type represents a compression method
+    type: string
+    enum:
+      - "gzip"
+      - "zlib"
+      - "deflate"
+      - "snappy"
+      - "x-snappy-framed"
+      - "zstd"
+      - "lz4"
+      - "none"
+      - ""