Remake dim_monthly_ntd_ridership_with_adjustments to

dim_monthly_ridership_with_adjustments (removed _ntd_).

- Format SQL file and reorder columns
- Remove irrelevant year column
- Rename columns to follow the same pattern as 
  the other new NTD models
- Add surrogate key

[#3519]

warehouse/models/mart/ntd/dim_monthly_ridership_with_adjustments.sql

@@ -0,0 +1,46 @@
+{{ config(materialized="table") }}
+
+WITH
+    source AS (
+        SELECT * FROM {{ ref("int_ntd__monthly_ridership_with_adjustments_joined") }}
+    ),
+
+    ntd_modes AS (
+        SELECT * FROM {{ ref("int_ntd__modes") }}
+    ),
+
+    dim_monthly_ridership_with_adjustments AS (
+        SELECT {{ dbt_utils.generate_surrogate_key(['ntd_id', 'mode', 'tos', 'period_month', 'period_year']) }} as key,
+               ntd_id,
+               legacy_ntd_id,
+               agency,
+               reporter_type,
+               concat(period_year, '-',  lpad(period_month, 2, '0')) AS period_year_month,
+               period_year,
+               period_month,
+               uza_name AS primary_uza_name,
+               uace_cd AS primary_uza_code,
+               _3_mode,
+               mode,
+               ntd_mode_full_name AS mode_name,
+               CASE
+                   WHEN mode IN ('AG', 'AR', 'CB', 'CC', 'CR', 'FB', 'HR', 'IP', 'IP', 'LR', 'MB', 'MG', 'MO', 'RB', 'SR', 'TB', 'TR', 'YR')
+                   THEN 'Fixed Route'
+                   WHEN mode IN ('DR', 'DT', 'VP', 'JT', 'PB')
+                   THEN 'Demand Response'
+                   ELSE 'Unknown' -- mode is null sometimes
+               END AS service_type,
+               mode_type_of_service_status,
+               tos,
+               upt,
+               vrm,
+               vrh,
+               voms,
+               _dt,
+               execution_ts
+          FROM source
+          LEFT JOIN ntd_modes
+            ON source.mode = ntd_modes.ntd_mode_abbreviation
+    )
+
+SELECT * FROM dim_monthly_ridership_with_adjustments