chore: updated grafana dashboard for better HBAR Rate Limit visibility

[quiet-node]

Description:
This PR adds the latest Grafana dashboard JSON file, including the newly added HBAR Rate Limit service metrics.

Fixes #3360

New Items:

• New Tile: Operator Balance Monitoring
Added a dashboard tile to monitor the current balance of the operator.

• New Tile: HBAR Rate Limit Counter
Introduced a tile to track the occurrences of HBAR rate limits, ensuring visibility into rate limit events.

• New Tile: Total HBAR Burnt Across the Network
Created a tile to display the total amount of HBAR burnt through all network activities.

• New Tiles: HBAR Burnt by Server Type
Added tiles to monitor the total HBAR burnt by HTTP and WebSocket (WS) servers individually.

• New Tiles: HBAR Burnt by Individual Pods
Introduced tiles to track the total HBAR burnt by each pod for both HTTP and WS servers.

• New Tiles: HBAR Spending Plans by Tier
Added tiles to monitor the unique number of HBAR spending plans, categorized by tiers (BASIC, EXTENDED, PRIVILEGED).

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

Test Results

 21 files   -   1  336 suites   - 29   38m 19s ⏱️ - 5m 20s
614 tests +101  605 ✅ + 99  4 💤 +2  5 ❌ ±0 
813 runs   - 105  801 ✅  - 103  4 💤  - 2  8 ❌ ±0 

For more details on these failures, see this check.

Results for commit 4c06106. ± Comparison against base commit b2bff54.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.98%. Comparing base (b2bff54) to head (4c06106).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3362      +/-   ##
==========================================
+ Coverage   83.87%   84.98%   +1.10%     
==========================================
  Files          69       69              
  Lines        4688     4688              
  Branches     1050     1050              
==========================================
+ Hits         3932     3984      +52     
+ Misses        426      393      -33     
+ Partials      330      311      -19     

Flag	Coverage Δ
config-service	98.14% <ø> (ø)
relay	79.72% <ø> (ø)
server	83.28% <ø> (ø)
ws-server	36.66% <ø> (ø)

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see 4 files with indirect coverage changes