refactor: address PR review - split Bedrock into two presets, restore SVG icon

Based on maintainer review feedback on PR #1047:

1. Split merged "AWS Bedrock" back into two separate presets:
   - "AWS Bedrock (AKSK)": uses AWS_ACCESS_KEY_ID + AWS_SECRET_ACCESS_KEY
   - "AWS Bedrock (API Key)": uses top-level apiKey field via standard UI input

2. Restore aws.svg to pure vector SVG (was PNG-in-SVG)

3. Remove all Bedrock-specific logic from shared components:
   - Remove isBedrock prop from ClaudeFormFields
   - Remove Bedrock validation/cleanup blocks from ProviderForm
   - Remove optional/isSecret from TemplateValueConfig
   - Remove optional skip from useTemplateValues

4. Add cloud_provider category handling:
   - Skip API Key/Base URL required validation
   - Hide Speed Test and Base URL for cloud_provider
   - Hide API format selector for cloud_provider (always Anthropic)
   - Show API Key input only when config has apiKey field

5. Fix providerConfigUtils to support top-level apiKey:
   - getApiKeyFromConfig: check config.apiKey before env fields
   - setApiKeyInConfig: write to config.apiKey when present
   - hasApiKeyField: detect top-level apiKey property

6. Add OpenClaw Bedrock preset (bedrock-converse-stream protocol)

7. Update model IDs:
   - Sonnet: global.anthropic.claude-sonnet-4-6
   - Opus: global.anthropic.claude-opus-4-6-v1
   - Haiku: global.anthropic.claude-haiku-4-5-20251001-v1:0

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/providers/forms/hooks/useTemplateValues.ts

@@ -263,10 +263,6 @@ export function useTemplateValues({
     }
 
     for (const [key, config] of templateValueEntries) {
-      // 跳过可选字段
-      if (config.optional) {
-        continue;
-      }
       const entry = templateValues[key];
       const resolvedValue = (
         entry?.editorValue ??