fix(a380): Fix T/D prediction in PERF CRZ & add T/D reached

[BravoMike99]

Fixes #8990

Summary of Changes

Changes time prediction in PERF page to show the ETA instead of remaining flight time if flight phase is not preflight.
Adds T/D prediction to PERF Cruise page.
Adds T/D Reached message to both PFD and MFD.
PFD code cleanup (remove non applicable messages) & some scratch pad messages were reworded to match a380.

Screenshots (if necessary)

References

Additional context

Discord username (if different from GitHub):
bruno_pt99

Testing instructions

1. Initialize all data in the FMS
2. Observe the ETA in the PERF CRZ or PERF DES pages before takeoff. It should indicate the total flight time.
3. After takeoff observe the same prediction as 2). It should now indicate the ETA at the destination.
4. Once in cruise flight, verify that the T/D distance and time predictions are available on the MFD on the PERF CRZ Page.
5. While flying in managed speed, don't initiate a descend after passing the T/D. "T/D REACHED" message should appear on both PFD & MFD.
6. Clear the scratchpad message which should make it disappear from both displays.
   6.1) Do the same as 5) but initiate a descent instead of manually clearing the message. Once that happens, the message should disappear from both displays.

How to download the PR for QA

Every new commit to this PR will cause new A32NX and A380X artifacts to be created, built, and uploaded.

1. Make sure you are signed in to GitHub
2. Click on the Checks tab on the PR
3. On the left side, find and click on the PR Build tab
4. Click on either flybywire-aircraft-a320-neo or flybywire-aircraft-a380-842 download link at the bottom of the page

[2hwk]

Quality Assurance Tester Report

Discord Username: 2cas
Object of testing: #9284
Aircraft: A380X
Tier of Testing: 1
Date: 13/11/2024

Testing Process:

• Initialize all data in the FMS
• Observe the ETA in the PERF CRZ or PERF DES pages before takeoff. It should indicate the total flight time.
• After takeoff observe the same prediction as 2). It should now indicate the ETA at the destination.
• Once in cruise flight, verify that the T/D distance and time predictions are available on the MFD on the PERF CRZ Page.
• While flying in managed speed, don't initiate a descend after passing the T/D. "T/D REACHED" message should appear on both PFD & MFD.
• Clear the scratchpad message which should make it disappear from both displays.
• 6.1) Do the same as 5) but initiate a descent instead of manually clearing the message. Once that happens, the message should disappear from both displays.

Testing Results:

• QA Passed

Negatives:

• N/A

Conclusions:

• LGTM